The work
What’s involved
A flail collector is a flail mower with a collection hopper. The rotor both cuts the grass and throws the material up a chute into a hopper on the back of the machine, which is tipped at a spot you agree, often a muck heap or a corner of the field.
Because the flails lift as well as cut, the machine picks up loose droppings, fallen leaves, thatch and litter. On horse paddocks that means less material left to feed worm larvae and sour the grass; on wildflower meadows it takes the cuttings off so the soil stays low in fertility.
The finish is closer to a mown lawn than a topped field. Most contractors can adjust cutting height, so a paddock can be cut short to tidy it up or left longer to keep some grazing.
When to do it
Paddocks can be flail collected at almost any time the ground is firm enough to carry a tractor, but it is most useful after grazing in summer to tidy rejected, rank grass, and in autumn to lift leaves and droppings before winter.
Wildflower meadows are traditionally cut after the plants have set seed, often from mid-July to September, with the cuttings removed. Avoid collecting on wet ground – the hopper gets heavy and the tyres mark the turf.